/Engine/Source/Runtime/Engine/Public/MaterialShared.h
Should the shader for this material with the given platform, shader type and vertex factory type combination be compiled
true if the shader should be compiled
virtual bool ShouldCache ( EShaderPlatform Platform, const [FShaderType](API\Runtime\RenderCore\FShaderType) * ShaderType, const [FVertexFactoryType](API\Runtime\RenderCore\FVertexFactoryType) * VertexFactoryType ) const